Magnetically-coupled bipolar radiofrequency ablation catheter

a radiofrequency ablation and magnetization technology, applied in the field of radiofrequency ablation catheters, can solve the problems of 5% chance of recurrence, difficult and dangerous procedures, and so as to increase the success rate, increase the adhesive force of myocardial tissue, and create transmural lesions more completely and easily

Inactive Publication Date: 2011-04-14
SEOUL NAT UNIV HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present invention makes it possible to increase the success rate to treat the region in which a transmural lesion could not be easily created by using conventional radiofrequency ablation catheters. Specifically, according to the present invention, two electrodes of the magnetic catheter and the working catheter arc pulled each other by magnetic force, and thus, it increases adhesive force to the myocardial tissue t...

Problems solved by technology

A left cardiac catheterization is recently developed and it is a very difficult and dangerous procedure because it is performed by inserting a catheter into artery in opposite direction of blood flow or puncturing interatrial septum; however, it is a very important diagnosing method.
Further, there is a possibility of death.
There is a chance to recur in ...

Method used

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  • Magnetically-coupled bipolar radiofrequency ablation catheter
  • Magnetically-coupled bipolar radiofrequency ablation catheter
  • Magnetically-coupled bipolar radiofrequency ablation catheter

Examples

Experimental program
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Effect test

example 1

Comparison of the Efficacy for Creating a Transmural Lesion

[0065]This experiment was performed to explore the efficacy of a magnetically-coupled bipolar catheter (MB) of the present invention in comparison with conventional unipolar (UA)or bipolar (BA) radiofrequency ablation catheters.

[0066]Neodymium magnets assembled in ablation catheters were used to facilitate tissue contact in a bipolar radiofrequency ablation system. In vitro sheets of porcine skeletal muscle with 10-mm thickness were ablated with a unipolar RF ablation catheter (UA), bipolar ablation system using a pair of catheters (BA), and magnetic bipolar system (MB) according to the present invention. One side of a skeletal-muscle sheet was exposed to saline with 37° C. and flow of 37 cm / sec mimicking LV endocardial surface. Another side of a sheet was exposed to air with same temperature mimicking epicardial surface. Five ablation lesions were created in each condition. Ablated tissues were fixed with 10% formalin and l...

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PUM

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Abstract

The present invention provides a bipolar radiofrequency ablation catheter comprising a working catheter and a magnetic catheter. The magnetic catheter comprises a first tube; a magnet; a first electrode; and a first electrode connector, and the working catheter comprises a second tube; a metallic element; a second electrode; and a second electrode connector. According to the present invention, it is possible to create transmural lesions more completely and easily at a thick myocardial region such as left ventricle in which a transmural lesion could not be easily created by using conventional radiofrequency ablation catheters and thus it is expected to increase the treatment efficiency for tachycardia such as ventricular tachycardia and atrial fibrillation.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a radiofrequency catheter ablation, and more particularly to a radiofrequency ablation catheter for treating tachycardia.BACKGROUND OF THE INVENTION[0002]A catheter is a tubular apparatus for drawing liquid from a body cavity or cavities of organs. A cardiac catheterization is a procedure to insert a flexible catheter into a blood vessel (artery or vein) and reach to heart. The cardiac catheterization is used to inject medicine, measure blood pressure and blood flow of heart and central blood vessel, or diagnose a congenital heart disease. In addition, the procedure is used to investigate a narrowed passage between atrium and ventricle, and abnormal blood flow, or insert electrodes into heart to restore or control heartbeat. A left cardiac catheterization is recently developed and it is a very difficult and dangerous procedure because it is performed by inserting a catheter into artery in opposite direction of blood flow o...

Claims

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Application Information

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IPC IPC(8): A61B18/18
CPCA61B18/1206A61B18/1492A61B2017/00243A61B2019/2253A61B2018/00875A61B2018/1467A61B2018/00577A61B34/73
Inventor OH, SEIL
Owner SEOUL NAT UNIV HOSPITAL
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